Quantum praedecessores is a papal bull issued on December 1, 1145, by Pope Eugenius III, calling for a Second Crusade. It was the first papal bull issued with a crusade as its subject. The bull was issued in response to the fall of Edessa, in December of 1144. Pilgrims from the east had brought news of the fall of Edessa to Europe throughout 1145, and embassies from the Principality of Antioch, the Kingdom of Jerusalem, and the Kingdom of A...